<template>
	<view>
		<view class="search-box">
			<uni-search-bar @input="input" :radius="100" cancelButton="none" :focus="true"></uni-search-bar>
		</view>
		<!-- 搜索建议列表 -->
		<view class="sugg-list" v-if="searchResults.length !== 0">
			<view class="sugg-item" v-for="(item,i) in searchResults" :key="i" @click="gotoDetail(item.goods)">
				<view class="goods-name">{{item.goods_name}}</view>
				<uni-icons type="arrowright" size="16"></uni-icons>
			</view>
		</view>
		<!-- 搜索历史 -->
		<view class="history-box" v-else>
			<view class="history-title">
				<text>搜索历史</text>
				<uni-icons type="trash" size="17" @click="cleanHistory"></uni-icons>
			</view>
		</view>
		<view class="history-list">
			<uni-tag :text="item" v-for="(item, i) in historys" :key="i" @click="gotoGoodsList(item)"></uni-tag>
		</view>
	</view>

</template>

<script>
	export default {
		data() {
			return {
				// 延时器
				timer: null,
				// 搜索关键字
				kw:	'',
				// 搜索结果列表
				searchResults: [],
				// 历史记录
				historyList: []
			};
		},
		onLoad() {
			this.historyList = JSON.parse(uni.getStorageSync('kw')||'[]')
		},
		computed: {
			historys(){
				return [...this.historyList].reverse()
			}
		},
		methods: {
			input(e){
				// 消除timer对应的延时器
				clearTimeout(this.timer)
				this.timer = setTimeout(()=>{
					this.kw = e.trim()
					this.getSearchList()
				},500)
			},
			async getSearchList(){
				if (this.kw === ''){
					this.searchResults = []
					return
				}
				
				const {data: res} = await uni.$http.get('/api/public/v1/goods/qsearch',{query: this.kw})
				if ( res.meta.status !== 200) return uni.$showMsg()
				this.searchResults = res.message
				
				this.saveSearchHistory()
			},
			saveSearchHistory(){
				const set = new Set(this.historyList)
				set.delete(this.kw)
				set.add(this.kw)
				this.historyList = Array.from(set)
				
				uni.setStorageSync('kw',JSON.stringify(this.historyList))
			},
			cleanHistory(){
				this.historyList = []
				uni.setStorageSync('kw','[]')
			},
			gotoDetail(goods_id){
				uni.navigateTo({
					url: '/subpkg/goods_detail/goods_detail?goods_id=' + goods_id
				})
			},
			gotoGoodsList(kw){
				uni.navigateTo({
					url: '/subpkg/goods_list/goods_list?query=' + kw
				})
			}
		}
	}
</script>

<style lang="scss">
	.search-box{
		position: sticky;
		top: 0;
		z-index: 999;
	}
	.sugg-list{
		padding: 0 5px;
		.sugg-item{
			font-size: 12px;
			padding: 13px 0;
			border-bottom: 1px solid #efefef;
			display: flex;
			align-items: center;
			justify-content: space-between;
			.goods-name{
				white-space: nowrap;
				overflow: hidden;
				text-overflow: ellipsis;
				margin-right: 3px;
			}
		}
	}
.history-box {
  padding: 0 5px;

  .history-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 40px;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
  }

  .history-list {
    display: flex;
    flex-wrap: wrap;

    .uni-tag {
      margin-top: 5px;
      margin-right: 5px;
    }
  }
}
</style>
